1606401723 has 16 divisors (see below), whose sum is σ = 2271874176. Its totient is φ = 1006154880.

The previous prime is 1606401677. The next prime is 1606401763. The reversal of 1606401723 is 3271046061.

It is not a de Polignac number, because 1606401723 - 2⁶ = 1606401659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1606401763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1540 + ... + 56702.

It is an arithmetic number, because the mean of its divisors is an integer number (141992136).

Almost surely, 2^1606401723 is an apocalyptic number.

1606401723 is a deficient number, since it is larger than the sum of its proper divisors (665472453).

1606401723 is a wasteful number, since it uses less digits than its factorization.

1606401723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55754.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1606401723 is about 40079.9416541491. The cubic root of 1606401723 is about 1171.1649154433.

Adding to 1606401723 its reverse (3271046061), we get a palindrome (4877447784).

The spelling of 1606401723 in words is "one billion, six hundred six million, four hundred one thousand, seven hundred twenty-three".